<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片 -->
        <el-card>
            <!-- 添加按钮 -->
            <el-row>
                <el-col>
                    <el-button
                        type="primary"
                        @click="addDialogVisible = true"
                    >添加角色</el-button>
                </el-col>
            </el-row>
            <!-- 角色列表 -->
            <el-table
                :data="rolesList"
                border
            >
                <!-- 展开列 -->
                <el-table-column label="明细" type="expand">
                    <template slot-scope="scope">
                        <!-- 渲染一级权限 -->
                        <el-row v-for="(item1,i1) in scope.row.children" :key="i1" :class="{bdbottom:true,bdtop:i1==0,vcenter:true}">
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <el-col :span="19">
                                <!-- 渲染二级权限 -->
                                <el-row v-for="(item2,i2) in item1.children" :key="i2" :class="{bdtop:i2!=0,vcenter:true}">
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <!-- 渲染三级权限 -->
                                        <el-tag type="warning" closable v-for="(item3,i3) in item2.children" :key="i3" @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <el-table-column
                    label="序号"
                    type="index"
                ></el-table-column>
                <el-table-column
                    label="角色名称"
                    prop="roleName"
                ></el-table-column>
                <el-table-column
                    label="角色描述"
                    prop="roleDesc"
                ></el-table-column>
                <el-table-column label="操作">
                    <template slot-scope="scope">
                        <el-button
                            size="mini"
                            type="primary"
                            icon="el-icon-edit"
                            @click="showEditDialog(scope.row.id)"
                        >编辑</el-button>
                        <el-button
                            size="mini"
                            type="danger"
                            icon="el-icon-delete"
                            @click="removeRoleById(scope.row.id)"
                        >删除</el-button>
                        <el-button
                            size="mini"
                            type="warning"
                            icon="el-icon-setting"
                            @click="showRightDialog(scope.row)"
                        >分配权限</el-button>
                    </template>
                </el-table-column>

            </el-table>
        </el-card>

        <!-- 添加角色的对话框 -->
        <el-dialog
            title="添加角色"
            :visible.sync="addDialogVisible"
            width="50%"
            @close="addRoleClosed"
        >
            <el-form
                ref="addFormRef"
                :model="addForm"
                :rules="addFormRules"
                label-width="80px"
            >
                <el-form-item
                    label="角色名称"
                    prop="roleName"
                >
                    <el-input v-model="addForm.roleName"></el-input>
                </el-form-item>
                <el-form-item
                    label="角色描述"
                    prop="roleDesc"
                >
                    <el-input v-model="addForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span
                slot="footer"
                class="dialog-footer"
            >
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button
                    type="primary"
                    @click="addRole"
                >确 定</el-button>
            </span>
        </el-dialog>
        <!-- 编辑角色的对话框 -->
        <el-dialog
            title="编辑角色"
            :visible.sync="editDialogVisible"
            width="50%"
            @close="editRoleClosed"
        >
            <el-form
                ref="editFormRef"
                :model="editForm"
                :rules="editFormRules"
                label-width="80px"
            >
                <el-form-item
                    label="角色名称"
                    prop="roleName"
                >
                    <el-input v-model="editForm.roleName"></el-input>
                </el-form-item>
                <el-form-item
                    label="角色描述"
                    prop="roleDesc"
                >
                    <el-input v-model="editForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span
                slot="footer"
                class="dialog-footer"
            >
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button
                    type="primary"
                    @click="editRole"
                >确 定</el-button>
            </span>
        </el-dialog>
        <!-- 分配权限的对话框 -->
        <el-dialog
            title="分配权限"
            :visible.sync="rightDialogVisible"
            width="70%"
            @close="rightDialogClosed"
        >
            <el-tree ref="treeRef" :data="rightsList" :props="treeProps" node-key="id" show-checkbox default-expand-all :default-checked-keys="defaultKeys"></el-tree>
            <span
                slot="footer"
                class="dialog-footer"
            >
                <el-button @click="rightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    created() {
        this.getRolesList()
    },
    data() {
        return {
            rolesList: [],
            addDialogVisible: false,
            addForm: {
                roleName: '',
                roleDesc: '',
            },
            addFormRules: {
                roleName: [{ required: true, message: '请输入角色名称', trigger: 'blur' }],
                roleDesc: [{ required: true, message: '请输入角色描述', trigger: 'blur' }],
            },
            editDialogVisible: false,
            editForm: {},
            editFormRules: {
                roleName: [{ required: true, message: '请输入角色名称', trigger: 'blur' }],
                roleDesc: [{ required: true, message: '请输入角色描述', trigger: 'blur' }],
            },
            rightDialogVisible:false,
            rightsList:[],
            // 树形组件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            // 默认选择节点id
            defaultKeys:[],
            roleId:''
        }
    },
    methods: {
        // 获取角色列表
        async getRolesList() {
            const { data: res } = await this.$http.get('roles')
            if (res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败')
            }
            this.rolesList = res.data
        },
        // 添加角色前校验
        addRole() {
            // 确定提交前的校验 ; this.$refs.addFormRef(拿到表单对象) ； valid（布尔值）
            this.$refs.addFormRef.validate(async (valid) => {
                if (!valid) return
                const { data: res } = await this.$http.post('roles', this.addForm)
                if (res.meta.status !== 201) {
                    return this.$message.error('添加角色失败')
                }
                this.addDialogVisible = false
                this.getRolesList()
                this.$message.success('添加角色成功')
            })
        },
        // 对话框关闭清空数据
        addRoleClosed() {
            this.$refs.addFormRef.resetFields()
        },
        // 显示编辑角色的对话框(数据的获取)
        async showEditDialog(id) {
            const { data: res } = await this.$http.get('roles/' + id)
            if (res.meta.status !== 200) {
                return this.$message.error('查询角色失败')
            }
            this.editForm = res.data
            this.editDialogVisible = true
        },
        // 编辑角色前校验
        editRole() {
            this.$refs.editFormRef.validate(async (valid) => {
                if (!valid) return
                const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
                    roleName: this.editForm.roleName,
                    roleDesc: this.editForm.roleDesc,
                })
                if (res.meta.status !== 200) {
                    return this.$message.error('修改角色失败')
                }
                this.editDialogVisible = false
                this.getRolesList()
                this.$message.success('修改角色成功')
            })
        },
        // 对话框关闭清空数据
        editRoleClosed() {
            this.$refs.editFormRef.resetFields()
        },
        // 删除角色
        removeRoleById(id) {
            this.$confirm('此操作将删除该角色, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning',
            })
                .then(async () => {
                    const {data:res} = await this.$http.delete('roles/'+id)
                    if(res.meta.status !== 200){
                        return this.$message.error('删除角色失败')
                    }
                    this.getRolesList()
                    this.$message.success('删除角色成功')

                })
                .catch(() => {
                    this.$message.info('已取消删除')
                })
        },
        // 根据Id删除角色下的权限
        removeRightById(role,rightId){
            this.$confirm('此操作将删除该权限, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning',
            })
                .then(async () => {
                    const {data:res} = await this.$http.delete('roles/'+role.id+'/rights/'+rightId)
                    if(res.meta.status !== 200){
                        return this.$message.error('删除权限失败')
                    }
                    // this.getRolesList()      //可以不重新刷整个列表
                    role.children = res.data    //返回最新权限列表，覆盖即可(数据与视图已绑定)
                    this.$message.success('删除权限成功')
                })
                .catch(() => {
                    this.$message.info('已取消')
                })
        },
        // 显示分配权限的对话框
        async showRightDialog(role){
            // 获取权限列表
            const {data:res} = await this.$http.get('rights/tree')
            if(res.meta.status !== 200){
                return this.$message.error('获取权限列表失败')
            }
            this.rightsList = res.data
            // console.log(this.rightsList)
            this.getLeafKeys(role)
            this.roleId = role.id
            this.rightDialogVisible = true
        },
        // 监听分配权限对话框的关闭
        rightDialogClosed(){
            this.defaultKeys = []   //重置
        },
        // 获取角色下所有三级权限id
        getLeafKeys(node){
            // 判断是否为三级权限
            if(!node.children){     //是三级权限
                return this.defaultKeys.push(node.id)
            }
            // 非三级权限 ； 递归
            node.children.forEach( item => {
                this.getLeafKeys(item)
            });
        },
        // 分配权限
        async allotRights(){
            const keys = this.$refs.treeRef.getCheckedKeys().concat(this.$refs.treeRef.getHalfCheckedKeys())
            const idStr = keys.join(',')          
            const {data:res} = await this.$http.post('roles/'+this.roleId+'/rights',{
                rids:idStr
            })
            if(res.meta.status !== 200){
                return this.$message.error('分配权限失败')
            }  
            this.rightDialogVisible = false
            this.getRolesList()
            this.$message.success('分配权限成功')
        }
    },
}
</script>

<style lang='less' scoped>
.el-tag{
    margin: 6px;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.bdtop{
    border-top: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>